Lubricator



Oct: 4, 1932- F. w. E D wARDs ET AL 9 3 LUBRICATOR Filed Aug. 15, 1950'4 Sheets-Sheet l EW. EDWARDS ET AL LUBRICATOR 4 Sheets-Sheet 2 FiledI5, 1930 Oct. 4, 1932.

F. w. EDWARDS ET AL 1,881,353

LUBRICATOR Filed Aug. 15. 1930 4 Sheets-Sheet Z5 -YW 61m Oct. 4, 1932.

F. W. EDWARDS ET AL LUBRICATOR Filed Aug. 15. 1930 4 Sheets-Sheet 4gwuzntow Patented Oct. 4, 1932 FRANK WILLIAM EDWARDS, OF CHICAGO,ILLINOIS, AND FORDYCE B. FARNSWORTH,

OF WADSWORTH, OHIO LU BR-IC'ATOR Application filed August 15, 1930.Serial No. 475,528.

This invention relates to lubricators, particularly lubricators of theforce feed type, and embodies improvements over the apparatus disclosedin our co-pending application Serial N 304,862, filed September 10,1928.

The object of the invention is to provide a mechanical force feedlubricator having means whereby the quantity of lubricant fed may bedetermined in proportion to the amount consumed as reflected by thepressure against which the lubricant is so fed.

The invention contemplates a mechanical force feed lubricator having aforcing cylinder and a forcing piston ope-rating therein, and a plungercooperating with the piston and movable in response to an operatingmember, preferably a cam, to which rotation may be imparted by a movingpart of the machine to be lubricated, and a control cylinder and pistonconnected with the foreing cylinder, the control piston being capable ofautomatic adjustment in response to variations in pressure of thelubricant fed by the forcing'piston and cooperating with means,preferably a lever, which will limit the return stroke of the forcingpiston in such a manner that as the pressure of lubricant fed decreasesthe stroke of the forcing piston may be lengthened to' force morelubrie'ant. The particular improvements forming the subject of thepresent invention are in mechanism associated with the control pistonand lever whereby exactness of adjust ment and perfection of operationmay be obtained and the mechanism simplified, and in means for providingfor operation of all or certain of the forcing pistons to produce feedof lubricant at a fixed predetermined rate or quantity, as we willproceed now to explain and finally claim.

In the accompanying drawings illustrating the invention, in the severalfigures of which like parts are similarly designated, Figure 1 is atransverse sectional elevation of a lubricator of the multiple feedtype, the section being taken substantially through aset of elements ofone feed mechanism or feed unit. 2 is a sectional elevation takensubstantially on the line 22 of Fig. 1. Fig. 8

" i fragmentary section similar to Fig.1

but illustrating amodification.= Fig. 4 is a fragmentary sectional planview taken on line 4-4 of Fig. 2. Fig. 5 is a sectional end view of thelubricator illustrating a means capable of substitution for the controlcylin- Extending substantially centrally through the lubricator bodyfrom end to end is a shaft 7 having a bearing 8 in one end 'ofthecasing, the opposite end of the shaft having a bearing 9 in the spindle10 of a spider 11.

This spider 11 carries drive pawls 12 which cooperate with arat'chetwheel 13 carried by the shaft 7. A similar ratchetwheel 14 ad jacent tothe bearing'S of the shaft is engaged by drag pawls 15. The outer end ofthe spindle 10 (see Fig. 2) extends througha stuffing box 16 outside ofthe casing 1, and is provided with a suitable-driving member 17 adaptedto be connected with a reciprocating element and by means of which anintermittent or step-by-step rotation may be imparted through the drivepawls 12 and ratchet wheel 13 to the shaft 7. Obviously,

the shaft 7 may be otherwise intermittently or continuously rotated.

Suitably arranged in and carried by'a removable member 18 which forms abottom for the casing 1, (see Fig. 1'), is a plurality of longitudinallyalined forcing cylinder members 19 provided with strainer screens 20'which protect'th-e lubricant inlet passagesfil of the cylinders againstentrance of 9 foreignmatter. In each cylinder 19 is a forcing piston 22provided with an eXpa-nsible packing member 23 at its bottom and with ahead 24 at its top. Between a suitable shoulder 25 on the cylindermember 19 and-the head 24 is arranged a spring 26 tending normally toforce the piston out of the cylinder, or in other words, to impart areturn stroke to the piston. The forcing pistons are interiorly boredupon two diameters to form, respectively, a bore for the reception of aforcing plun er27 and a lubricant inlet opening 28. lateral bore 29communicates with the interior bores and is adapted upon register withthe inlet ports 21 to admit 1 lubricant through the bore 28 intotheforcing cylinder. In verticalalinement with each of theforcingplungers 27 is a cam or eccentric 30 keyed to the shaft 7 and rotatabletherewith. These eccentrics, as shown, maybe set at various anglesrelatively to the shaft, so that the several forcingiplungers may be andpreferably are successively rather than simultaneously operated. The

forcing plungers 27 are held in contant confoot 41 having a shank42slidable within a sleeve member 43 and backedup by a spring 44,.thenormaltendency of which spring is to force the presser foot downwardlytoward the control piston 39. These parts 41, 42, 43

and 44 provide a spring-pressed member and an abutment for the springthereof. Each of the sleeve members 43 extends upwardly through a guidemember 45 and is provided for a considerable distance adjacent to itsupper end with screwthreads 46 cooperating witlrcomplementalscrewthreads-in the upper longitudinally extending bracket member 47preferably integral with and carrying the several guides 45. Above itsscrewthreaded portion 46 each sleeve member 43 is provided with anon-cylindrical extension or end 48',-'

preferablyoctagonal, and arranged for cooperation with all of theseoctagonal ends is a locking bar or wrench 49 having a number ofoctagonal sockets 50 equal in number to thenumber of sleeve members 43.The locking bar or wrench 49 is also provided with a socketwrench.end,'the socket 51* of which is'complemental to the octagonalends 48 of the several sleeve members 43, whereby upon removal ofthelocking bar or wrench from the position shown in Fig. 4, it may beused to adjust any one or all of the several sleeve members, as may benecessary OICl'9SlTQCl.'

The shanks 42 "of the presser'feet are providedwith rods 52 which extendupwardly.

through the sleeve members and above the octagonal portions thereof, theupwardly projecting ends of the rods being provided with screwthreads 53for a purpose hereinafter explained.

The bracket member-47 is provided with a gage member 54 (see Figs. 1, 2and 4) which furnishes a means whereby the relative vertical adjustmentof the several sleeve members may be gaged by means of a suitable rule,as will be hereinafter explained.

' The parts last described,including the upper ends of the sleevemembers 43, the bracket member 47, locking bar or wrench 49, etc,

are housed within a removable cover or cap 55 mounted upon studs 56 andheld in place by nuts 57. I Extending between the head 40 of each of thecontrol pistons 39,- and its respective axially alined 'presser foot 41is one, end 58 of a lever 59 pivoted at 60 upon a bracket 61 carried bythe part 18. The opposite end 62 of this lever is forked and embracesitsrespective forcing plunger 27 and thus extends into the path ofmovement of and is'in position to limit upwardor return movement of therespective forcing piston'22. Obviously, the lower the end '58 of thelever 59 descends, thehigher its opposite end 62 will lie above itsrespective forcing piston, and hence the longer will be the returnstroke of the forcmg piston and the greater the amount of lubricantwhich may be displaced by it upon 7 its forcing stroke under theinfluence of its ica1n30. Under nocircumstances can the adjustment ofthe end 62 of lever. 59 relatively to its forcing piston be such'thatthe forcing pistoncan follow its forcing plunger com pletely upward. Thereason for his is f'hat the end 63 of the'forcing plunger is form-ed asa valve for-cooperation with the upper endof the bore 28. Hence, inorder to admit .oil through the:' openings 21, ports, 29 and bore 28tonhe forcing cylinder, the end 63 of the forcing plunger 27 must risesufficiently hi'gherthanthe forcing piston to unseat its end 63 from thebore 28. When the forcing i plunger-makes its downward stroke its end 63seats in bore-'28,'and closes this bore and hence seals the forcingcylinder, and ca rries the; forcing piston downwardly into the cyl-inder,thu s forcing the lubricant through the bores 33 'and34 pastcheck'valves 35 and 36 and into the feed pipe 64, there being one ofsuch feed pipes for each food unit; Con'tinued operation of thelubrioatoriwillbuild up pressure in the feed 'pi'pes'64 and thispressure will, through the bores 37, be communicated to the controlcylinders'38 and the contro lpilstons 39. ther e'in. As the pressurethus builtup rises, it'will raise the control piston.

and with it the end 58 of lever 59 until the ,member43, as shown inFig.1, and thus the end 62 of lever, 59 willbe depressed to itslimit'ito permit only the minimum 1 stroke. of

the forcing piston and consequently the minpresser foot 41 seats againstthe end of sleeve ii'num feed of lubricant. If the pressure of lubricantupon the control piston 39 -de creases, for any reason, the controlpiston will lower, and the end 58 of lever 59 will follow the controlpiston under the influence of the spring 44 and presser foot 41, and theend 62 of lever 59 will be elevated to permit increase of the forcingstroke of the forcing piston. As the pressure again builds up theoriginal rate of feed will be reestablished.

Lubricators of this type, when they leave the factory and are deliveredto the user, have their forcing pistons so adjusted as to have a strokeof approximately one-sixteenth of an inch. This length of stroke hasbeen found to be fully effective for the purposes for which thelubricator is primarily designed. If, however, it should be foundnecessary to increase or diminish this stroke, this may be done asfollows :First the cap is removed, by removing the nuts 57. Then thewrench 49, which is usually sealed in position when the lubricatorleaves the factory, is removed by breaking the seal and lifting it offof the octagonal ends 48 of the sleeve members 43. Then the socket end51 of the wrench is applied to the octagonal end 48 of that sleevemember which forms a .part of the forcing unit the feed of which is tobe increased or diminished.

One full turn downward of a sleeve member 43 will approximately doublethe feed of lubricant produced by the forcing piston associatedtherewith. Thus aone-eighth turn or rotation of the sleeve member, whichrotation can be accurately observed, will substantially increase thefeed to that particular .unit. The eifect of so turning the sleevemember 43 as to lower it will result in the earlier stopping the rise ofthe end 58 of lever 59 and less depression of the end 62 thereof, thuspermitting. increased stroke of its respective forcing piston.Similarly, turning of the sleeve member in the opposite direction willpermit greater rise of the end 58 of the lever under influence of itsrespective control piston 39 and'consequently greater depression of itsend 62 and shortening of the forcing stroke of the forcing piston.

Obviously, the several sleeve members and consequently the forcingefiect of their respective forcing units, may be adjusted independentlyin. this manner, and after desired adjustment has been made, suchadjustment may be retained by replacement of the wrench 49, as shown inFig. .4.

.If an undesired difference in feed between certain of the forcing unitsis noticed, those units may be checked by placing a suitable scale withits end resting against the top of the sleeve member 43, and sighting onthe scale against the gage member 54. Bythus sighting all of the severalsleeve members and adjusting them appropriately to bring them all to thesame reading on the scale with respect to thegage member 54, the feedsof the several units may be equalized. This is true for the reason thatall of the sleeve members and the control partsassociated therewith aresubstantially identical and standard, and any difierence in the settingof any of the sleeve members will indicate a 'difierence in the strokeof the forcing pistons associated therewith.

If it should be desired to remove allot thesleevemembers 43 and theparts directly connected therewith as a unit, this may be done readilybydisconnecting the bracket member 47' from its supports in the casing 1by removing the nuts 65 from the studs 56 and lifting the whole assemblybodily out of the casing 1. It will be obvious that when this is done,some meansmust be provided to hold the presser feet 41 against movementunder the influence of their springs 44, otherwise they and the springswould drop into the reservoir. It is for this purpose that we providethe screwthreads 53 at the upper ends of the rods 52, for'by applyingnuts to these rods by means of these screwthreads, they,

and the presser feet 41 and springs 44 with them, may be held againstmovement relatively to the sleeve members 43 and be thus removedwith theother parts.

In order to adjust the several pumping units so that their setting maybe made uniform, we provide the bores 37 throughout a portion of theirlength with screwthreads 66 and give access thereto through openingsprovided with plugs 67, and provide the drag ratchet with a plurality-ofbores correspond ing in number to the number of pumping units, in theinstance illustrated six, as indicated at a, b, 0, cl, 6, and'f. Byreference to Fig. 1, it will be seen that these six bores are in radialalinement with the low points of the six. cams'30 indicated at a, b, c",d", e and f, respectively, which cooperate with the pumping units which,for convenience of description we will call Nos. 1,2, 3, 4, 5 and 6,reading from left to right of Fig. 2. As will be seen by reference toFigs. 1 and 6, the bore a which bears a definite relation to the cam aof pumping unit No. 1, passes completely through the ratchet 14 whereasthe other holes 6, c, d, e and f pass only part way therethrough. Thuswhen a rod 14 is inserted in an opening 14 as shown in Fig. 6, it may bepassed freely through'bore a, thus indicating that the cam a of unit No.1 is in its lowest position, whereas this rod will enter but will bestopped by the other bores which pass only part way through theratchet.v Thus, when bore a has been found, the'other bores may belocated in proper sequence by appropriate counter-clockwise rotation ofshaft 7,, as viewed in Fig. 1. f

The desired adjustment ofthe several pumping units isaccomplished byfirst'adjusting each of the pumping units to a posiof plug is screwedinto bore 28 until it bore a has not yet been found,

'tion' in" which there is no movement of its forcing piston 22, called a,no-stroke posic This Is done in the following man tion; ner :'To setpumping unit No. 1 to no-stroke position, a suitable plug (not shown) isre- I the fact that the rod .will not pass through any of these otherbores it will be known that After cam a has been positioned in thismanner,'th-e plug ,35i ancd check valve 35 are removed from unit No. 1and a rod (not.

shown) having screwthreads similar to those engages the bottom of piston22', thus holdmg the piston 22v and plunger 2? against the cam a.

ward against the end 58 of lever 59, the forked end 62 of this leverbeing thereby forced down against the head 24: of piston the end ofsleeve member lE. 48 is screwed down by means of its octagonal end 53 ofrod 52 to holdthe spring l4: compressed and presser foot 41 incontact'with end 48 until presser foot 41 strikes the end 58 of thelever. The portion of gage '54 ad- 'jacentto thissleeve member is thenfiled down even withthe top of the portion -18.

Now, if sleeve member 43 is screwed down so that the top of 48 is'onethirty-second of an inch below the top ofgage 54, unit No. 1

will have a forcing stroke of: one thirty-sec Obviously the other unitsmay 'beadjusted .in'hke manner by successively engaging the rod 1 5*with the bores'b, '0, (he and f in SllC. cession, by proper rotation ofshaft 7.

7 ed the desired number of turns'to give the desired stroke to theforcing pistons 22 and then. the wrench 4:9 is applied to all of theends 48, as shown in Fig. 4c. 7 I r V In order that theadjustment-retaining function of; the wrench 49 may be .supplemented toprevent any possible movement of. the sleeve members 13 which. mighttake place relatively thereto because of wear or'the like,

' we 'split the upper portions of the screwcthreaded portions of thebracket membe r 47 longitudinally and provide between eachiof 'through'aduct 71 pipe 72. V 7 Also the plug 67 is removed,jand a. It will be seenthat when pressure fluid is I screwthreaded rod (not, shown) is screwedv7 into bore 37 to 'force control piston 39 up.

Then member such members a "locking cap screw 67' by 'means of whichaclamping action between the parts may be obtained. Obviously, whenadqustment is to be'made, these cap screws mustbe' loosened and thentightened after 3 adjustment is completed. 7

' Under some conditions it may be deemed advisableto adjust all ottheforcing units to full forcing stroke and effect preferably "from remotecontrol, for example,trom the 7 cab of a locomotive to which thelubricator may be applied, and we have devised the means illustrated inFig. 3 for this purpose.

These means comprise above each of the control assemblies and in axialalinement therewith, a fluid pressure cylinder68 prefl erably formingapart of the cover member and provided with a piston 69 having ,'a

stemYO slidable in aguide 70 and provided 'with an adjustable push rod70 extending into proximity to the screwthreaded 'e'nd of its respectiverod 52. Pressurefiuidmay be admitted above the pressure piston" 69admitted abovethe piston 69, the piston will be forceddown and its pushrod70 will con.- tact with and depress the rod 52, thus depressing thepresser toot l1 and so oscillating connected with-ca supply sired by theprovision of an appropriate Valve control for the pressure fluid feedp'ipes' 'f2.

the rod 52 may be adjusted, we provide a In order that the extent ofdepression of l screwthreaded plug 74 in a cap 75 which forms the top orthe cylinder 68, and this plug Y may be removed and socket Wrenchinserted v to loosen the lock-nut 76,'aifter Whichthe push rod 7O may beadjusted by means of a screwdriver, and the nut 76"therea-ftertightened.

It will thus be seen that we provide a lubricator, having thecharacteristics hereinbetore mentioned, in which the mechanism foreffecting control of the lubricant forcing ef feet of theforcingpistonsis simplified and I I v I improved as comparedwith the equivalentOf course the sleeve members i3'are rotatmecha 'iism employed inthe'lubricator fdisclosed in ourTco-pending application mentioned. V

In the present eral forcing pistons is determined, are act-u ated.directly by the' control pistons rathen than throughintermediatemechanism, a s'dis maintained in operative position in engage A mentwith the control pistons bymeans'of spring-pressed presser feet.ilandadjustable V invention the'levers 59 by means of which the returnstroke" of the sevi be varied, is directly determined. Moreover,

we provide means whereby all of the springpressed members mentioned,specifically the sleeve members l3, may be fired in adjusted positionsuch a manner as to preclude the likelihood of their becoming vibratedor otherwise rotated out of adjustment.

Insome installations it may be found desirable to dispense with theautomatic pressure responsive control of the stroke of the forcingpistons 22, and to maintain a constant adjustment of such stroke. eitherof one or more of such pistons, or of all of same. To this end weprovide the mechanism illustrated in Fig. 5, which may be used toreplace the parts of the control arrangement hereinbefore described.This mechanism includes a plug 77 which may be screwed into the boreprovided for the control cylinder 38 of Fig. 1, having openings 78 forthe reception of a spanner and provided with an interior, screw-threadedbore 7 9 within which is adjustably fitted the complementally threadedend of a rod 80. This rod carries a fixed collar 81 with which theforked end 58 of a lever 59 engages, the other forked end62 of thislever engaging the head 24 of the forcing piston 22. The upper end ofthe rod 80 is screw-threaded as indicated at 82, and passes through abracket d7, by which it is guided. Appropriate rotation of the rod 80 bymeans of its non-cylindrical end 83 results in the raising or lowering.of its collar 81 by means of the screwthreaded arrangement at 79.Adjustment, when obtained, may be fixed by means of a lock-nut Slseating against the top of the bracket 47'. A wrench 85, simi lar to thewrench 49, may be'provided for locking the plurality of rods againstrotation.

'With this arrangement it will be obvious that the lower the setting ofthe collar 81 the greater will'be the forcing effect of the foreingpiston of its respective unit, and the higher the setting of thiscollar, the less will be such forcing effect. But, so long as the sameadjustment is maintained, the stroke of the forcing piston will remainthe same, as distinguished from the arrangement previously describedwherein the control cylinder and piston arrangement is used.

One of the-marked advantages of our lubricator in which the controlunits are used, both as hereinbefore described and as disclosed by oursaid co-pending application, is that when the pipes leading from thelubricator to the points of delivery'are empty, the forcing pistons willautomatically operate at full stroke immediately upon the starting ofthe operation of thelubricator, and'the pipes will be rapidly filledwith lubricant. Thus manual adjustment or abnormally rapid initialoperation of the lubricator for this purpose, either by hand ormechanically, is made unneces sary. Of course, as soon as the requiredpredetermined pressure is built up in the pipes the stroke of theforcing pistons is automatically reduced to-thatnecessary to maintain apressure adequate-for normallubricant feed, Various changes-in detailsof'construction' and arrangement of parts of the lubricator, and in itsmode of operation, are contemplated as within the spirit of theinvention and the scope of the following claims.

What we claim'is:

1. In a'lubricator, of the mechanical force feed type, having alubricant forcing device including a forcing piston, and a controldevice including a control piston for determining the stroke and hencethe forcing effect of said forcing piston, the combination of meansoperated upon by said control pis: ton for determining the stroke of theforcing piston including a lever pivoted intermediate its ends andhaving one end-resiliently main tained in cooperation with the controlpiston and its other end extending into the pathof movement of saidforcing piston.

. 2. In a lubricator, of the mechanical force feed type, having alubricant forcing device including a forcing piston, and a control device including a control piston for determining the stroke and hencetheforcing efiect of said forcing. piston, the combination of meansoperated upon'by said control piston for determining the stroke of theforcing piston, including a lever pivoted intermediate its ends andhaving one end resiliently main tained in cooperation with the controlpiston and its other end extending into the path of movement of saidforcing piston, themeans for resiliently maintaining said lever end incooperation with said control piston including a spring-pressed memberbearingagainst said lever end, and a member forming an abutment for thespring of the spring-pressed member and for said spring-pressed memberand adjustable relatively to said lever.

8. In a lubricator, of the mechanical force feed type, having alubricant forcing device includinga forcing piston, and a control deviceincluding a control piston for. determining the stroke and hence theforcing effect of I said forcing piston, the combinationv of meansoperated upon by said control piston for determining the stroke of theforcing piston, including a lever pivoted intermediate its endsand'having one end resiliently maintained in cooperation with thecontrol piston and its other end extending into the path of movement ofsaid forcing piston, the means for resiliently maintaining said leverend in cooperation with said control piston including a presser foot, anadjustable member by which said presser foot is carried and relativelyto which it is movable, and a spring interposed between said presserfoot and'adjustable member, said adjustable member beoperation'withisaidcontrol piston including ing adjustable amid and' away'from said Controlpiston.

4- In alubricaton ofthe mechanical force feed type, having a lubricantforcing device 7 including a forcing piston, and a control dea ,presserfoot, an adjustable member by ,iwhich said presser foot is carried andrelatively towhich it is movable, alspring interposed between saidpresser foot and adjust able member and a rod connected with saidpresser foot and extending through said ad justab'le member and providedwith means whereby relative movement between said presser footand'adjustable member may be prevented, said adjustable member beingad-. justable'toward'and away from said control piston. i

5. In a lubricator, of themechanicalforce feed type, having aplurality'of lubricant forcing units each including a forcing piston anda control piston, the "combination of means operated upon by the controlpistons for determining the forcing effect of the forcing pistons,including a plurality of levers pivoted intermediate their ends andhaving one end resiliently maintained in cooperation with the controlpistons and their other ends in the path of movement of the forcingpistons, the means for resiliently maintaining said lever ends incooperation with said control pistons including spring-pressed Inem-fbers bearing against said lever ends, and adjustable members formingabutments'for the springs of the springpressed members, said ad ustablemembers provided with 'means 7 whereby their adjustment may be fixedrelatively to each other.

6. In a lubricator, of the mechanical force feed type, having aplurality of lubricant forcing units each including a forcing piston anda control piston,the combination of means operated upon by the controlpistons for determining the forcing effect of the foreingpistons,including a plurality of levers pivoted intermediate their ends andhaving one end resiliently maintained in cooperation with the controlpistons and their other ends in the path of movement of the forcingpistons, the means for resiliently maintaining said lever ends incooperation withsaid control; pistons including spring-pressed membersbearing against said lever ends, and ro- I tatably adjustable membersforming abut nients for the of the spring-pressed members, said adjustable members provided with means whereby their adjustment maybe fixedrelatively to each other'including a lock ing ar engageablecwith allofsaid adjustable members simultaneously.

I 7 In a lubricator, of the mechanical force: feed type, havingaflplurality of lubricant forcing units each including a forcing pistonand a control piston, the combination of means operatedgupon by thecontrol pistons for determining the forcing effect of the fore-J ingpistons, including a plurality of levers pivoted intermediate theirendsand having one end resiliently maintained in cooperation with thecontrol pistons and their other ends in the path of movement of theforcing pistons, the means for resiliently maintaining said lever endsin cooperation with said spring-pressed with sockets complemental tosaid ends and engageable with all of said endssimultane ously,

8. In 7 feed type, having' a plurality of lubricant forcingunits eachincluding a forcingpiston and acontrol piston, the combination ofmeans'operated upon by the control pistons for determining the forcingefi'e'ct of the forcingpistons, includinga plurality of levers pivotedintermediate their ends and hav ing one end resiliently maintained incoop eration with the control pistons and their other ends in the pathof movemet of ,the forcing pistons, the means for resilientlymaintaining said lever ends in cooperation with said controlpistonsincluding spring-i pressed members bearing againstsaid lever ends, adustable members forming abutments for the spr ngs of the spr ng-pressedmema lubricator, of the mechanical force able, members and a locking barprovided 7 iio bers, and a bracket member provided with guides andsupporting and adjusting means for said ad ustable members, said adustable members, springs and spring-pressed men iia hers being removablewith said bracket member from said lubricator as a unit.

9. In al'ubricator, of the mechanical force feed type, having aplurality of lubricant forcing units each including a forcing pis- I tonand a control piston, the combination of means operated upon by thecontrol pistons for determining the forcing effect of the foreingpistons, including a plurality of levers pivoted intermediate their,ends and having one end resiliently maintained in cooperation with thecontrol pistons and their other ends in the path of. movement oftheforcing pistons, the means for resiliently maintaining said lever endsin cooperation with said control pistons including spring-pressedmembers bearing against said lever ends, adjustable members formingabutments for the springs of the spring-pressed members, and a bracketmember providing a support and guide for said adjustable members, saidbracket member carryingmeans whereby the adjustment of said adjustablemembers may be gaged. 1

10. In a lubricator, of the mechanical force feed type, having aplurality of lubricant forcing units each including a forcing piston anda control piston, the combination of means operated upon by the controlpistons for determining the forcing effect of the forcing pistons,including a plurality of levers pivoted intermediate their ends andhaving one end resiliently maintained in cooperation with the controlpistons and their other ends in the path of movement of the forcingpistons, the means for resiliently maintaining said lever ends incooperation with said control pistons including springpressed membersbearing against said lever ends, adjustable members forming abutmentsfor the springs of the spring-pressed members, a bracket memberproviding a sup port and guides for said adjustable members, andcooperating screwthreads in said bracket member and adjustable memberswhereby the latter may be adjusted.

11. In a lubricator of the mechanical force feed type, having alubricant forcing device including a forcing piston, and a controldevice, said control device including a control cylinder and piston forautomatically determining the stroke of the forcing piston in responseto lubricant pressure and means operated upon by said control piston fordetermining the stroke of the forcing piston including a lever pivotedintermediate its ends and having one end cooperating with the controlpiston and its other end extending into the path of movement of saidforcing piston, of means adapted to replace said control cylinder andpiston for rendering said stroke adjustment non-automatic, said meansincluding an adjustable member for cooperation with the first-mentionedend of said lever.

12. In a lubricator of the mechanical force feed type, having alubricant forcing device including a. forcing piston, and a controldevice, said control device including a control cylinder and piston forautomatically determining the stroke of the forcing piston in re sponseto lubricant pressure and means operated upon by said control piston fordeter mining the stroke of the forcing piston including a lever pivotedintermediate its ends and having one end cooperating with the controlpiston and its other end extending into the path of movement of saidforcing piston, of means adapted to replace said control cylinder andpiston for rendering said

